Lead spindle



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' LEAD SPINDLE.

Application filed March 31, 1921. Serial No. 457,562.

all whom t may concern.' Be it known that we, HERBERT C. RYDING, and GEORGE A. Minnen, citizens of the United States, residing in Birmingham, Alabama,

' driving mechanism of such mills' and of varions other machines.

The accompanying-drawings' illustrate one embodiment of our invention. I

Fig. 1 is an, elevation of the same with parts in section and showing -the driving and driven connections at the ends of the spindle; l

Fig. 2 is a'plan -partly in sectionof the two parts of the spindle assembled;

-Figg is a tace elevation of one of the parts'o' the spindle, and Fig. lisa face elevatios of the other;

5. is a'detail section on the line `5-.5 of Fig. 1. f A

Referring to the drawings, the spindle is composed of' two vparts land 2 provided at their outer ends with fish-tails 3 of the usual type with segmental circular edges. Each of the 4ish-tailends is mounted in a block l adapted ,to rock in a plane at right angles `to the rocking plane of the fish-tails so as to constitute a universal joint, the block 4 being carried between jaws 5 of the coupling block 6 and held in place by a split sleeve 7 which carries adjustable set screws 7a which engage thecrowned'- portion of the {ish-tail. 'lhe sleeves 7 serve to hold the spindle cen'- tral and to prevent the slapping motion of the fish-tail. rlhe coupling illustrated is of a common type, and any other usual or suitable coupling may be substituted therefor.

The coupling' member at one end is fastenedto the end of a 'motor shaft 8, and theopposite coupling member to the driven shaft '9 which operates the mill, usually through interposed gearing. l

The coupling member 1 is provided with a flange 10 and with a central projecting pin 11, Fig. 2, which enters a socket 12 in the flange 13 of the member 2, the pin making a loose fit in the socket so as to allow ample space for lubrication and to avoid galling Amuch the less expensive.

when the fastening bolts, hereinafter described, break. j

r The parts are held together by means of bolts -passing through holes 14 and 15 inthe respective lflanges, and thev faces oi:- the flanges are formed with circular grooves 16 and 17 respectively in line with the holes,'

nd of a depth illustrated in dotted lines in nach of the bolts has a Shank. is, an integral head 19 and a reduced breaking portion 20. Each bolt is held yagainst endwise movement by a key 21 passing through a slot 22 in the bolt and bearing against a washer 23 as shown in Figs. l and'2. rlhe grooves 16 and .17 are of a combined depth about equal to the length of the breaking -portion 20 of the bolts, or at least suliicient to permit a rotation of one part of the spindle. with respect to the other when the bolts break and leave the broken end of a bolt projecting beyond the face of the opposite flange. The reduction in diameter of the part 20 of the bolt is such as to permit its withdrawal when it breaks notwithstanding any burr or other distortionon the broken en Under an excessive strain the bolts will break through the reduced parts 20. But the central pin and socket engagement will hold the parts of the spindle in substantial alignment. For this reason this spindle is safer than the old type.

merely that of the bolts, which is only a` small fraction of ythe cost of the old unitary spindle, andha breakage for this reason so Our improved spindle, therefore, has considerable advantage in safety and in the cost of material and time necessary for repairs when it breaks under any undue strain.

rPhe bolts described fasten the parts of the spindle together longitudinally and also serve to transmit the.. rotary movement of one to thel other. Various other fastening means may be used for fastening the parts together for rotary motion, and it is only the rotary connection thatjneeds to be breakable. Though we have described with great'particularityof detail certain specific embodi` ments of our invention, yet it will be undeiyv stood thatthe invention is not restricted to the particular embodiments disclosed. Va-

Also the broken bolts can be removed and new ones installed withl rious modifications thereof in detail and in.

the arrangement of the parts may be made by those skilled in the art without departure from the invention as defined in the following claims.`

What we claim is:

1. A breaking lead spindle comprising parts having flanges with fastening bolts extendingthrough said flanges, the flanges having grooves on their meeting faces adapted to accommodate the ends of the bolts when the latter break so as to permit rotation of the parts with relation to each other.

2. A breaking lead spindle comprising parts 1 and 2 with universal couplings on their' ends, said parts having flanges 10 and 13 with registering bolt holes therethrough and having grooves 16 and 17 to accommodate the broken ends of suchbolts.

. 3. A breaking lead spindle comprising parts 1 and 2 with universal couplings on their ends, said parts having flanges and 13 with registering bolt holes therethrough and'having grooves 16 and 17 to'accommodate the broken ends of such bolts, the part l having a pin 11 entering a socket 12 in the other part to hold the two parts in alignment.

et. A breaking lead spindle comprising parts l and 2 with universal couplings on their ends, said parts having flanges 1() and 13 with registering bolt holes therethrough and having grooves 16 and 17 to accommodate the broken ends of such bolts, the part other part to holdrthe two parts in alignment in combination with bolts fastening said flanges together and having intermediate re duced portions 20 of a length corresponding with the distance between the bottoms of the grooves 16 and 17.

ln Witness whereof, We have hereunto signed our names.

HERBERT C. RYDING. GEORGE A. MILLAR. 

